/* =============================================================================
   ChatBox v2.0 - Modern Chat Application Styles
   Version: 2.0
   Description: Modern, animated, professional styling with Inter font
   ============================================================================= */

/* CSS Custom Properties (Variables) */
:root {
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    
    /* Color Palette - Professional Dark Theme */
    --primary-color: #3B82F6;
    --primary-hover: #2563EB;
    --primary-dark: #1E40AF;
    --secondary-color: #64748B;
    --secondary-hover: #475569;
    
    /* Background Colors */
    --bg-primary: #0F1419;
    --bg-secondary: #1A1F2E;
    --bg-tertiary: #252B3A;
    --bg-chat: #1E2532;
    --bg-sidebar: #151B26;
    --bg-modal: #1A1F2E;
    --bg-header: #0D1117;
    
    /* Text Colors */
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #64748B;
    --text-accent: #3B82F6;
    
    /* Border Colors */
    --border-color: #334155;
    --border-light: #475569;
    --border-focus: #3B82F6;
    
    /* Status Colors */
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --info-color: #06B6D4;
    
    /* Glow Effects */
    --glow-primary: 0 0 20px rgba(59, 130, 246, 0.3);
    --glow-success: 0 0 20px rgba(16, 185, 129, 0.3);
    --glow-warning: 0 0 20px rgba(245, 158, 11, 0.3);
    --glow-error: 0 0 20px rgba(239, 68, 68, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    
    /* Authentication Colors */
    --auth-bg: #1A1F2E;
    --auth-tab-active: #3B82F6;
    --auth-tab-inactive: #64748B;
    --auth-input-bg: #252B3A;
    --auth-input-border: #334155;
    --auth-input-focus: #3B82F6;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Z-Index Layers */
    --z-modal: 1000;
    --z-toast: 1100;
    --z-context-menu: 1200;
    --z-loading: 9999;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow: hidden; /* No scrolling in fullscreen */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    overflow: hidden; /* Prevent body scrolling in fullscreen */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

/* Hide scrollbar for WebKit browsers in fullscreen */
body::-webkit-scrollbar {
    display: none;
}

/* Allow scrolling only on very small screens or mobile devices */
@media (max-height: 600px) and (max-width: 768px) {
    body {
        overflow: auto;
        min-height: 100vh;
        height: auto;
    }
}

/* Ensure no scrolling on desktop/laptop screens - ONLY for welcome screen */
@media (min-width: 769px) and (min-height: 601px) {
    body.welcome-mode {
        overflow: hidden !important;
        height: 100vh;
        scrollbar-width: none !important; /* Firefox */
        -ms-overflow-style: none !important; /* IE and Edge */
    }
    
    body.welcome-mode::-webkit-scrollbar {
        display: none !important; /* WebKit browsers */
    }
    
    .app-container.welcome-mode {
        overflow: hidden !important;
    }
    
    .welcome-screen.desktop-optimized {
        overflow: hidden !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }
    
    .welcome-screen.desktop-optimized .welcome-container {
        overflow: visible !important;
        max-height: calc(100vh - 60px) !important; /* Account for any margins */
        transform: scale(0.85) !important; /* Scale down content to fit */
        transform-origin: center !important;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-hover);
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    animation: fadeIn 0.5s ease-in-out;
}

.loading-content {
    text-align: center;
    animation: slideUp 0.8s ease-out;
}

.loading-logo {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    animation: pulse 2s infinite;
}

.loading-text {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(45deg, var(--primary-color), var(--text-primary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: textPulse 2s ease-in-out infinite;
}

.loading-spinner {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid transparent;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spinLoader 1s linear infinite;
    background: transparent;
    position: relative;
}

@keyframes spinLoader {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* App Container */
.app-container {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    animation: fadeIn 0.5s ease-in-out;
    overflow: hidden; /* Prevent scrolling in fullscreen */
}

/* Header */
.header {
    height: 64px;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.brand:hover {
    transform: scale(1.02);
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    box-shadow: var(--glow-primary);
    animation: glow 3s ease-in-out infinite alternate;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.brand-subtitle {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-btn {
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.header-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.notification-wrapper {
    position: relative;
}

.notification-btn .notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    min-width: 18px;
    height: 18px;
    background: var(--error-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce 0.5s ease-out;
}

.notification-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 320px;
    max-height: 400px;
    background: var(--bg-modal);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    display: none;
    flex-direction: column;
    animation: slideInDown 0.3s ease-out;
}

.notification-dropdown.show {
    display: flex;
}

.notification-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.notification-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.clear-all-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.clear-all-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.notification-list {
    flex: 1;
    overflow-y: auto;
    max-height: 300px;
}

.notification-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
    cursor: pointer;
}

.notification-item:hover {
    background: var(--bg-secondary);
}

.notification-item:last-child {
    border-bottom: none;
}

.notification-item.empty-state {
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
    cursor: default;
}

.notification-item.empty-state:hover {
    background: transparent;
}

.notification-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.notification-item.empty-state .notification-icon {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-content p {
    font-size: 0.875rem;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs) 0;
    line-height: 1.4;
}

.notification-content small {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.notification-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    flex-shrink: 0;
    margin-left: var(--spacing-sm);
}

.notification-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
    height: auto;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.user-avatar:hover {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--glow-primary);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

/* Welcome Screen */
.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
    min-height: 0; /* Allow shrinking when needed */
    height: 100%; /* Ensure it takes full available height */
}

.welcome-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.welcome-container {
    max-width: 500px;
    width: 100%;
    padding: var(--spacing-xl);
    text-align: center;
    position: relative;
    z-index: 1;
    animation: slideUp 0.8s ease-out;
    height: fit-content;
    max-height: 90vh; /* More generous height on desktop */
    overflow: visible; /* Remove scrollbar from welcome container */
}

.welcome-hero {
    margin-bottom: var(--spacing-lg); /* Reduced from 2xl to lg */
}

.hero-icon {
    font-size: 5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    animation: float 3s ease-in-out infinite;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(45deg, var(--text-primary), var(--primary-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.welcome-form {
    margin-bottom: var(--spacing-2xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.input-container {
    position: relative;
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
    outline: none;
}

.form-input:focus {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.form-input:focus + .input-glow {
    opacity: 1;
    transform: scale(1);
}

.input-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, var(--primary-color), transparent);
    border-radius: var(--radius-lg);
    opacity: 0;
    transform: scale(0.95);
    transition: all var(--transition-normal);
    pointer-events: none;
    z-index: -1;
}

.form-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.join-btn {
    width: 100%;
    position: relative;
    overflow: hidden;
}

.welcome-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    animation: slideUp 0.8s ease-out 0.2s both;
}

/* Responsive adjustments for small heights */
@media (max-height: 700px) {
    .welcome-container {
        padding: var(--spacing-md); /* Further reduced padding */
    }
    
    .welcome-hero {
        margin-bottom: var(--spacing-md);
    }
    
    .auth-container {
        margin-bottom: var(--spacing-md);
    }
    
    .secondary-buttons {
        margin-bottom: var(--spacing-sm);
    }
    
    .auth-inputs .form-group {
        margin-bottom: 0.75rem; /* Further reduced spacing */
    }
}

.feature-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.feature-card:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

/* Chat Interface */
.chat-interface {
    flex: 1;
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 0;
    height: calc(100vh - 64px);
    animation: slideIn 0.5s ease-out;
    min-height: 0; /* Allow proper flex shrinking */
}

/* Override for fullscreen mode */
@media screen and (min-height: 769px) {
    .chat-interface {
        height: calc(100vh - 48px); /* Account for reduced header height */
    }
}

/* Sidebar */
.sidebar {
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideInLeft 0.5s ease-out;
}

.room-tabs {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.room-tab {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-xs);
    border: 1px solid transparent;
}

.room-tab:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
    transform: translateX(4px);
}

.room-tab.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    box-shadow: var(--glow-primary);
    transform: translateX(4px);
}

.tab-icon {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.room-tab.active .tab-icon {
    background: rgba(255, 255, 255, 0.2);
}

.tab-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tab-name {
    font-weight: 500;
    font-size: 0.875rem;
}

.tab-status {
    font-size: 0.75rem;
    opacity: 0.8;
}

.room-actions {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
}

.room-actions .btn {
    flex: 1;
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-md);
}

.users-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.section-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.user-count {
    background: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    min-width: 24px;
    text-align: center;
}

.users-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.user-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
    animation: slideInUp 0.3s ease-out;
}

.user-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(2px);
}

.user-avatar-small {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
    position: relative;
}

.user-avatar-small::after {
    content: '';
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 10px;
    height: 10px;
    background: var(--success-color);
    border: 2px solid var(--bg-sidebar);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-status {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.room-info-section {
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.room-info-content {
    padding: var(--spacing-md);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.info-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.info-value {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.info-value.connected {
    color: var(--success-color);
}

.sidebar-actions {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
}

/* Chat Area */
.chat-area {
    display: flex;
    flex-direction: column;
    background: var(--bg-chat);
    animation: fadeIn 0.5s ease-out 0.2s both;
}

.chat-header {
    height: 60px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
}

.room-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.room-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.125rem;
}

.room-details {
    flex: 1;
}

.room-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.125rem;
}

.room-description {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.chat-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.messages-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.messages-list {
    height: 100%;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.message {
    display: flex;
    gap: var(--spacing-md);
    animation: messageSlideIn 0.3s ease-out;
    opacity: 0;
    animation-fill-mode: forwards;
}

.message.own {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.message.own .message-avatar {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.message.own .message-header {
    justify-content: flex-end;
}

.message-author {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.message.own .message-author {
    color: var(--primary-color);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.message-text {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    line-height: 1.5;
    word-wrap: break-word;
    position: relative;
    max-width: 70%;
}

.message.own .message-text {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    border-color: var(--primary-color);
    margin-left: auto;
}

.message-input-area {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md);
}

.message-input-wrapper {
    position: relative;
    flex: 1;
}

.message-input {
    width: 100%;
    min-height: 44px;
    max-height: 120px;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 0.875rem;
    resize: none;
    outline: none;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.message-input-area .input-container {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.input-btn {
    width: 44px;
    height: 44px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.input-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.input-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.char-counter {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.send-btn {
    width: 44px;
    height: 44px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.input-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Activity Panel */
.activity-panel {
    background: var(--bg-sidebar);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    animation: slideInRight 0.5s ease-out;
}

.panel-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.panel-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.activity-stats {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.stat-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    animation: slideInUp 0.3s ease-out;
}

.stat-card:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
}

.stat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}

.quick-actions {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.panel-subheader {
    margin-bottom: var(--spacing-md);
}

.panel-subheader h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    outline: none;
    font-family: inherit;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    border: 1px solid var(--primary-color);
    box-shadow: var(--glow-primary);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-dark));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow-primary);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-tertiary);
    border-color: var(--border-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-danger {
    background: var(--error-color);
    color: white;
    border: 1px solid var(--error-color);
}

.btn-danger:hover:not(:disabled) {
    background: #DC2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, var(--primary-color), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.btn:hover .btn-glow {
    opacity: 0.2;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(8px);
    animation: fadeIn 0.3s ease-out;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: var(--bg-modal);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    padding: 0;
}

.modal-body {
    padding: var(--spacing-lg);
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    justify-content: flex-end;
}

/* Form Elements */
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
    outline: none;
    cursor: pointer;
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

/* Settings */
.settings-section {
    margin-bottom: var(--spacing-xl);
}

.settings-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.setting-item {
    margin-bottom: var(--spacing-md);
}

.setting-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.setting-label:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-light);
}

.toggle-input {
    display: none;
}

.toggle-slider {
    width: 48px;
    height: 24px;
    background: var(--border-color);
    border-radius: 12px;
    position: relative;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.toggle-input:checked + .toggle-slider {
    background: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.toggle-input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 80px;
    right: var(--spacing-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--bg-modal);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    animation: toastSlideIn 0.3s ease-out;
    position: relative;
    overflow: hidden;
}

.toast::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
}

.toast.success::before {
    background: var(--success-color);
}

.toast.warning::before {
    background: var(--warning-color);
}

.toast.error::before {
    background: var(--error-color);
}

.toast-content {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.toast-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 0.875rem;
    color: white;
    flex-shrink: 0;
}

.toast.success .toast-icon {
    background: var(--success-color);
}

.toast.warning .toast-icon {
    background: var(--warning-color);
}

.toast.error .toast-icon {
    background: var(--error-color);
}

.toast-message {
    flex: 1;
}

.toast-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.125rem;
}

.toast-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.toast-close {
    width: 20px;
    height: 20px;
    padding: 0;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.toast-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Context Menu */
.context-menu {
    position: fixed;
    background: var(--bg-modal);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-context-menu);
    min-width: 160px;
    overflow: hidden;
    display: none;
    animation: contextMenuSlideIn 0.2s ease-out;
}

.context-menu.show {
    display: block;
}

.context-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    font-size: 0.875rem;
    color: var(--text-primary);
}

.context-item:hover {
    background: var(--bg-secondary);
}

.context-item i {
    width: 16px;
    text-align: center;
    color: var(--text-muted);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes contextMenuSlideIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes textPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.02);
    }
}

@keyframes glow {
    from {
        box-shadow: var(--glow-primary);
    }
    to {
        box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0, 0, 0);
    }
    40%, 43% {
        transform: translate3d(0, -8px, 0);
    }
    70% {
        transform: translate3d(0, -4px, 0);
    }
    90% {
        transform: translate3d(0, -2px, 0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .chat-interface {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }
    
    .sidebar {
        grid-row: 1;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .activity-panel {
        display: none;
    }
    
    .welcome-features {
        grid-template-columns: 1fr;
    }
    
    .header {
        padding: 0 var(--spacing-md);
    }
    
    .modal {
        width: 95%;
        margin: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .header-center {
        display: none;
    }
    
    .brand-text {
        display: none;
    }
    
    .welcome-container {
        padding: var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .toast-container {
        right: var(--spacing-md);
        left: var(--spacing-md);
    }
    
    .toast {
        min-width: auto;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #64748B;
        --text-muted: #94A3B8;
    }
}

/* Typing Indicators */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    animation: slideInUp 0.3s ease-out;
}

.typing-avatar {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.typing-content {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.typing-text {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-style: italic;
}

.typing-dots {
    display: flex;
    gap: 3px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: typingPulse 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-dot:nth-child(2) {
    animation-delay: -0.16s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0;
}

@keyframes typingPulse {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Message Link Styling */
.message-text a {
    color: #60A5FA;
    text-decoration: none;
    border-bottom: 1px dotted #60A5FA;
    transition: all var(--transition-fast);
    word-break: break-all;
}

.message-text a:hover {
    color: #3B82F6;
    border-bottom-style: solid;
    background: rgba(96, 165, 250, 0.1);
    padding: 0 2px;
    border-radius: 3px;
}

.message.own .message-text a {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.7);
}

.message.own .message-text a:hover {
    color: white;
    border-bottom-color: white;
    background: rgba(255, 255, 255, 0.2);
}

/* Message Emoji Styling */
.message-text .emoji {
    font-size: 1.2em;
    vertical-align: middle;
    display: inline-block;
    margin: 0 2px;
}

/* User Status Indicators */
.user-status-online {
    color: var(--success-color) !important;
}

.user-status-away {
    color: var(--warning-color) !important;
}

.user-status-offline {
    color: var(--text-muted) !important;
}

/* Connection Quality Indicator */
.connection-quality {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: var(--spacing-xs);
}

.quality-bar {
    width: 3px;
    height: 8px;
    background: var(--border-color);
    border-radius: 1px;
    transition: background var(--transition-fast);
}

.quality-bar.active {
    background: var(--success-color);
}

.quality-bar.medium {
    background: var(--warning-color);
}

.quality-bar.poor {
    background: var(--error-color);
}

/* Rate Limit Warning */
.rate-limit-warning {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid var(--warning-color);
    border-radius: var(--radius-md);
    color: var(--warning-color);
    font-size: 0.75rem;
    margin-top: var(--spacing-xs);
    animation: slideInUp 0.3s ease-out;
}

.rate-limit-warning i {
    font-size: 0.875rem;
}

/* Enhanced Loading States */
.message-sending {
    opacity: 0.7;
    position: relative;
}

.message-sending::after {
    content: '';
    position: absolute;
    top: 50%;
    right: var(--spacing-md);
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    border: 2px solid transparent;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Notification Enhancements */
.notification-preview {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--bg-modal);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    max-width: 300px;
    z-index: var(--z-toast);
    animation: slideInRight 0.3s ease-out;
    display: none;
}

.notification-preview.show {
    display: block;
}

/* Sound Toggle Indicator */
.sound-indicator {
    position: relative;
}

.sound-indicator.muted::after {
    content: '\f6a9';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    top: -5px;
    right: -5px;
    font-size: 0.75rem;
    color: var(--error-color);
}

/* Auto-scroll indicator */
.auto-scroll-indicator {
    position: absolute;
    bottom: 80px;
    right: var(--spacing-lg);
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    animation: slideInUp 0.3s ease-out;
    display: none;
    z-index: 10;
}

.auto-scroll-indicator.show {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.auto-scroll-indicator:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Message timestamp on hover */
.message:hover .message-timestamp {
    color: var(--text-secondary);
}

/* Enhanced focus styles */
.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
    background: var(--bg-primary);
}

/* Room notification badges */
.room-tab .notification-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    min-width: 16px;
    height: 16px;
    background: var(--error-color);
    color: white;
    font-size: 0.6rem;
    font-weight: 600;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce 0.5s ease-out;
}

/* Compact mode styles */
.chat-interface.compact-mode .message {
    gap: var(--spacing-sm);
}

.chat-interface.compact-mode .message-avatar {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
}

.chat-interface.compact-mode .message-text {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.8rem;
}

.chat-interface.compact-mode .messages-list {
    gap: var(--spacing-sm);
}

/* Accessibility enhancements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus visible for keyboard navigation */
.btn:focus-visible,
.form-input:focus-visible,
.room-tab:focus-visible,
.user-item:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* User List Modal */
.user-list-container {
    max-height: 400px;
    overflow-y: auto;
}

.user-list-container .user-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    animation: slideInUp 0.3s ease-out;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.user-list-container .user-item:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.user-list-container .user-avatar-small {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    position: relative;
    flex-shrink: 0;
}

.user-list-container .user-avatar-small::after {
    content: '';
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 12px;
    height: 12px;
    background: var(--success-color);
    border: 2px solid var(--bg-modal);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.user-list-container .user-info {
    flex: 1;
    min-width: 0;
}

.user-list-container .user-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.125rem;
}

.user-list-container .user-status {
    font-size: 0.875rem;
    color: var(--success-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.user-list-container .user-status i {
    font-size: 0.75rem;
}

.user-list-container .user-actions {
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.user-list-container .user-item:hover .user-actions {
    opacity: 1;
}

.user-list-container .user-action-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-list-container .user-action-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.user-list-empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.user-list-empty i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-muted);
}

/* Settings Toggles Fix */
.setting-item .toggle-input:checked + .toggle-slider {
    background: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.setting-item .toggle-input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

.setting-item .toggle-slider {
    width: 48px;
    height: 24px;
    background: var(--border-color);
    border-radius: 12px;
    position: relative;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.setting-item .toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

/* Clickable activity stats */
.stat-card.clickable {
    cursor: pointer;
}

.stat-card.clickable:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Dark/Light theme toggle implementation */
[data-theme="light"] {
    /* Light Theme Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --bg-chat: #FFFFFF;
    --bg-sidebar: #F8FAFC;
    --bg-modal: #FFFFFF;
    --bg-header: #FFFFFF;
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #64748B;
    
    --border-color: #E2E8F0;
    --border-light: #CBD5E1;
    
    /* Shadows for light mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Enhanced Dark Theme (default) */
:root {
    /* Enhanced Dark Theme Colors */
    --bg-primary: #0A0E14;
    --bg-secondary: #151921;
    --bg-tertiary: #1E242E;
    --bg-chat: #151921;
    --bg-sidebar: #0F1419;
    --bg-modal: #1A1F2E;
    --bg-header: #0A0E14;
    
    --text-primary: #E6E8EB;
    --text-secondary: #B8BCC8;
    --text-muted: #6C7293;
    
    --border-color: #2A2E39;
    --border-light: #3A3F4A;
    
    /* Enhanced shadows for dark mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.8);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.9);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.9);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.95);
}

/* Private Room Styles */
.room-tab.private {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(220, 38, 38, 0.05));
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.room-tab.private .tab-status i {
    color: #EF4444;
}

.room-tab.private:hover {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(220, 38, 38, 0.1));
    border-color: rgba(239, 68, 68, 0.3);
}

.room-tab.private.active {
    background: linear-gradient(135deg, #EF4444, #DC2626);
    border-color: #EF4444;
}

.room-tab.private .room-admin-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    background: #F59E0B;
    color: white;
    font-size: 0.6rem;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}

.private-room-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-left: auto;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.room-tab.private:hover .private-room-actions {
    opacity: 1;
}

.private-room-btn {
    width: 20px;
    height: 20px;
    padding: 0;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 3px;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
}

.private-room-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Room Preview Styles */
.room-preview {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.preview-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.preview-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.preview-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.preview-value {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.preview-value.warning {
    color: var(--warning-color);
}

.preview-value.success {
    color: var(--success-color);
}

/* Admin Controls */
.admin-controls {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(217, 119, 6, 0.05));
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-lg);
}

.admin-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: #F59E0B;
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.admin-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.admin-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
    border-radius: var(--radius-md);
}

.admin-btn.danger {
    background: var(--error-color);
    border-color: var(--error-color);
}

.admin-btn.warning {
    background: var(--warning-color);
    border-color: var(--warning-color);
    color: #1A1F2E;
}

/* Developer Credits Footer */
.developer-credits {
    position: fixed !important; /* Change to fixed positioning */
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    background: var(--bg-header); /* Use the correct header background */
    border-top: 1px solid var(--border-color); /* Use the correct border color */
    padding: 8px var(--spacing-md);
    z-index: 1000 !important; /* Higher z-index */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex !important; /* Force display */
    visibility: visible !important; /* Force visibility */
    min-height: 50px !important; /* Force minimum height */
}

.credits-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex !important;
    justify-content: center;
    align-items: center;
    color: var(--text-secondary) !important; /* Use theme text color */
    visibility: visible !important;
}

.developer-info {
    display: flex !important;
    flex-direction: column;
    align-items: center;
    gap: 4px; /* Reduced gap for compact footer */
    text-align: center;
    color: var(--text-secondary) !important;
    visibility: visible !important;
}

.credits-text {
    color: var(--text-primary) !important; /* Use primary text color */
    display: block !important;
    visibility: visible !important;
    font-size: 0.85rem !important; /* Smaller font for footer */
    font-weight: 400;
}

.credits-text i {
    color: var(--primary-color) !important; /* Use theme primary color */
    margin-right: 6px;
}

.repo-links {
    display: flex !important;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary) !important;
    visibility: visible !important;
    font-size: 0.75rem !important;
}

.developer-link,
.repo-link {
    color: var(--primary-color) !important; /* Use theme primary color */
    text-decoration: none !important;
    display: inline !important;
    visibility: visible !important;
    transition: color 0.2s ease;
}

.developer-link:hover,
.repo-link:hover {
    color: var(--primary-hover) !important; /* Use theme primary hover color */
    text-decoration: underline !important;
}

.repo-link i {
    margin-right: 4px;
    color: var(--primary-color) !important;
}

.separator {
    color: var(--text-muted) !important; /* Use theme muted text color */
    display: inline !important;
    font-weight: 300;
}

.credits-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.credits-text i {
    color: var(--primary-color);
    margin-right: var(--spacing-xs);
}

.developer-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.developer-link:hover {
    transform: translateY(-1px);
    filter: brightness(1.2);
}

.repo-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.repo-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.repo-link:hover {
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.repo-link i {
    font-size: 0.9rem;
}

.separator {
    color: var(--text-muted);
    font-weight: 300;
}

/* Responsive Design - Make UI adjustable */
.app-container {
    height: 100vh;
    width: 100vw;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden; /* No scrolling on fullscreen */
}

.main-content {
    flex: 1;
    display: flex;
    overflow: hidden; /* No scrolling on fullscreen */
    height: calc(100vh - 140px); /* Account for header and footer */
}

/* Allow scrolling only on smaller screens */
@media (max-height: 768px), (max-width: 1024px) {
    .app-container {
        min-height: 100vh;
        height: auto;
        overflow: auto;
    }
    
    .main-content {
        overflow: auto;
        min-height: calc(100vh - 140px);
        height: auto;
    }
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0; /* Allow shrinking */
    overflow: auto; /* Allow scrolling */
}

.sidebar {
    width: 280px;
    min-width: 280px;
    flex-shrink: 0;
}

/* Mobile and Tablet Responsive Breakpoints */
@media (max-width: 1024px) {
    .sidebar {
        width: 260px;
        min-width: 260px;
    }
    
    .main-content {
        flex-direction: column;
    }
    
    .chat-container {
        order: 1;
    }
    
    .sidebar {
        order: 2;
        width: 100%;
        max-height: 200px;
        overflow-y: auto;
    }
}

@media (max-width: 768px) {
    .header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .brand-text .brand-name {
        font-size: 1.2rem;
    }
    
    .brand-text .brand-subtitle {
        font-size: 0.8rem;
    }
    
    .developer-info {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .repo-links {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .modal {
        width: 95%;
        max-width: none;
        margin: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .credits-text {
        font-size: 0.8rem;
    }
    
    .repo-link {
        font-size: 0.75rem;
        padding: var(--spacing-xs);
    }
    
    .developer-credits {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* Window Resizing Support */
@media (max-height: 600px) {
    .developer-credits {
        padding: var(--spacing-xs) var(--spacing-md);
    }
    
    .credits-text {
        font-size: 0.8rem;
    }
    
    .repo-links {
        gap: var(--spacing-xs); /* Reduce gap on short screens */
    }
}

/* High DPI Display Support */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .brand-icon i,
    .hero-icon i {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Welcome Screen and Layout Adjustments */
.welcome-screen {
    min-height: calc(100vh - 140px); /* Account for header and footer */
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
}

.welcome-container {
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-xl);
}

/* Chat Interface Adjustments */
.chat-interface {
    min-height: calc(100vh - 140px); /* Account for header and footer */
    overflow: auto;
}

/* Sidebar Adjustments */
.sidebar {
    overflow-y: auto;
    max-height: 100%;
}

/* Messages List Scrolling */
.messages-list {
    overflow-y: auto;
    flex: 1;
    max-height: calc(100vh - 300px); /* Adjust based on other elements */
}

/* Ensure proper scrolling on mobile */
@media (max-width: 768px) {
    .app-container {
        overflow-x: hidden;
        overflow-y: auto;
    }
    
    .main-content {
        flex-direction: column;
        overflow: auto;
    }
    
    .chat-container {
        overflow: auto;
    }
}

/* Enhanced Features Styles */
.user-stats {
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #ffffff;
    margin-left: auto;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Fullscreen layout optimization - Fit developer section without scrolling */
@media screen and (min-height: 769px) {
    /* Significantly reduce header height */
    .header {
        height: 48px; /* Reduced from 64px to 48px */
        padding: 0 var(--spacing-md); /* Reduce horizontal padding */
    }
    
    /* Optimize main content area with explicit height constraint */
    .main-content {
        flex: 1;
        min-height: 0;
        max-height: calc(100vh - 110px); /* Reserve 48px for header + 62px for footer */
        overflow: hidden;
    }
    
    /* Adjust chat interface to be more compact */
    .chat-interface {
        height: calc(100vh - 110px); /* Reduced from 140px to account for smaller header and footer */
        display: flex;
        flex-direction: column;
        min-height: 0;
    }
    
    /* Optimize messages container */
    .messages-container {
        flex: 1;
        min-height: 0;
        overflow: hidden;
    }
    
    .messages-list {
        max-height: calc(100vh - 150px); /* More aggressive optimization */
        overflow-y: auto;
        padding: var(--spacing-sm); /* Reduce padding */
    }
    
    /* Significantly reduce developer footer padding and height */
    .developer-credits {
        padding: 8px var(--spacing-md); /* Much smaller padding */
        font-size: 0.85rem; /* Smaller font */
        position: relative;
        margin-top: auto;
        min-height: 60px; /* Increase min height to ensure content is visible */
        max-height: 62px; /* Set max height to prevent overflow */
        display: flex !important; /* Force display */
        visibility: visible !important; /* Force visibility */
        flex-shrink: 0; /* Prevent shrinking */
        background: rgba(255, 255, 255, 0.1) !important; /* Temporary background to see the area */
        border-top: 2px solid #4fc3f7 !important; /* Visible border */
    }
    
    /* Ensure developer content is visible in fullscreen */
    .developer-credits .credits-content {
        display: flex !important;
        width: 100%;
        align-items: center;
        justify-content: center;
        color: #ffffff !important; /* Force white text */
    }
    
    .developer-credits .developer-info {
        display: flex !important;
        flex-direction: column;
        align-items: center;
        gap: 4px; /* Reduce gap */
        text-align: center;
        color: #ffffff !important;
    }
    
    .developer-credits .credits-text {
        font-size: 0.8rem;
        line-height: 1.2;
        color: #ffffff !important;
        display: block !important;
        visibility: visible !important;
    }
    
    .developer-credits .repo-links {
        display: flex !important;
        align-items: center;
        gap: 8px;
        font-size: 0.75rem;
        color: #ffffff !important;
        visibility: visible !important;
    }
    
    .developer-credits .developer-link,
    .developer-credits .repo-link {
        color: #4fc3f7 !important;
        text-decoration: none !important;
        display: inline !important;
        visibility: visible !important;
    }
    
    .developer-credits .separator {
        color: #ffffff !important;
        display: inline !important;
    }
    
    /* Compact input area more aggressively */
    .message-input-area {
        padding: 8px var(--spacing-md); /* Reduced padding significantly */
    }
    
    /* Reduce spacing in welcome screen */
    .welcome-container {
        padding: var(--spacing-md); /* Further reduced padding */
        max-width: 450px; /* Slightly smaller max width */
    }
    
    /* Make welcome content more compact */
    .welcome-content {
        gap: var(--spacing-md); /* Reduce gap between elements */
    }
    
    /* Reduce logo/icon size */
    .chat-icon {
        width: 80px; /* Reduce from default size */
        height: 80px;
        margin-bottom: var(--spacing-sm);
    }
    
    /* Make title more compact */
    .welcome-title {
        font-size: 2rem; /* Reduce title size */
        margin-bottom: var(--spacing-sm);
    }
    
    /* Make subtitle more compact */
    .welcome-subtitle {
        font-size: 1rem; /* Reduce subtitle size */
        margin-bottom: var(--spacing-md);
    }
    
    /* Make feature cards more compact */
    .features-grid {
        gap: var(--spacing-sm); /* Reduce gap */
        margin: var(--spacing-md) 0; /* Reduce margins */
    }
    
    .feature-card {
        padding: var(--spacing-sm); /* Reduce padding */
    }
}

/* Windowed mode - Keep existing scrolling behavior */
@media screen and (max-height: 768px) {
    .messages-list {
        max-height: calc(100vh - 300px);
        overflow-y: auto;
    }
    
    /* Allow scrolling in windowed mode */
    body {
        overflow-y: auto;
    }
    
    .app-container {
        min-height: 100vh;
        height: auto;
    }
}

.room-info {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.room-name {
    font-weight: 500;
}

.user-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
}

/* Typing Indicators */
.typing-indicators {
    padding: 10px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
    font-size: 0.9rem;
    animation: fadeIn 0.3s ease-in;
}

.typing-indicator .username {
    color: #4fc3f7;
    font-weight: 500;
}

.typing-indicator .dots {
    display: flex;
    gap: 2px;
}

.typing-indicator .dots span {
    animation: typingDots 1.4s infinite;
    opacity: 0.4;
}

.typing-indicator .dots span:nth-child(1) {
    animation-delay: 0ms;
}

.typing-indicator .dots span:nth-child(2) {
    animation-delay: 200ms;
}

.typing-indicator .dots span:nth-child(3) {
    animation-delay: 400ms;
}

@keyframes typingDots {
    0%, 60%, 100% {
        opacity: 0.4;
    }
    30% {
        opacity: 1;
    }
}

/* System Announcements */
.system-announcement {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
    margin: 15px 20px;
    padding: 15px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: announceSlideIn 0.5s ease-out;
}

.announcement-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #ffffff;
    font-size: 0.9rem;
}

.announcement-header i {
    font-size: 1.1rem;
}

.announcement-header .timestamp {
    margin-left: auto;
    font-size: 0.8rem;
    opacity: 0.8;
}

.announcement-message {
    color: #ffffff;
    font-size: 1rem;
    line-height: 1.4;
}

@keyframes announceSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =============================================================================
   Authentication System Styles
   ============================================================================= */

/* Welcome Screen Authentication Tabs */
.welcome-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 4px;
    border: 1px solid var(--border-color);
}

.welcome-tab {
    flex: 1;
    padding: 12px 24px;
    background: transparent;
    border: none;
    color: var(--auth-tab-inactive);
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.welcome-tab:hover {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.1);
}

.welcome-tab.active {
    background: var(--auth-tab-active);
    color: white;
    box-shadow: var(--shadow-md);
}

.welcome-tab.active::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    pointer-events: none;
}

/* Authentication Form Container */
.auth-form-container {
    display: none;
    animation: fadeInUp 0.3s ease-out;
}

.auth-form-container.active {
    display: block;
}

/* Authentication Form Styles */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
}

.form-input {
    padding: 12px 16px;
    background: var(--auth-input-bg);
    border: 1px solid var(--auth-input-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus {
    border-color: var(--auth-input-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: var(--bg-tertiary);
}

.form-input::placeholder {
    color: var(--text-muted);
}

/* Auth Button Styles */
.auth-btn {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.auth-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.auth-btn:active {
    transform: translateY(0);
}

.auth-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.auth-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.auth-btn.secondary:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* =============================================================================
   Profile Modal Styles
   ============================================================================= */

.profile-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease-out;
}

.profile-modal.show {
    display: flex;
}

.profile-modal-content {
    background: var(--bg-modal);
    border-radius: 16px;
    padding: 2rem;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    position: relative;
    animation: modalSlideIn 0.3s ease-out;
}

.profile-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.profile-modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.profile-close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all var(--transition-fast);
    line-height: 1;
}

.profile-close-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

/* Profile Avatar Section */
.profile-avatar-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 2rem;
}

.profile-avatar-container {
    position: relative;
    margin-bottom: 1rem;
}

.profile-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.profile-avatar-placeholder {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 3px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--text-muted);
    font-weight: 600;
}

.avatar-upload-btn {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 2px solid var(--bg-modal);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-fast);
}

.avatar-upload-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
}

.avatar-upload-input {
    display: none;
}

/* Profile Form Sections */
.profile-section {
    margin-bottom: 2rem;
}

.profile-section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.profile-form-group {
    margin-bottom: 1rem;
}

.profile-form-group:last-child {
    margin-bottom: 0;
}

.profile-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--auth-input-bg);
    border: 1px solid var(--auth-input-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all var(--transition-fast);
    outline: none;
    box-sizing: border-box;
}

.profile-input:focus {
    border-color: var(--auth-input-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: var(--bg-tertiary);
}

.profile-textarea {
    min-height: 80px;
    resize: vertical;
    font-family: var(--font-family);
}

/* Profile Stats */
.profile-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.profile-stat {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.profile-stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.profile-stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Profile Action Buttons */
.profile-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.profile-btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.profile-btn.primary {
    background: var(--primary-color);
    color: white;
}

.profile-btn.primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.profile-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.profile-btn.secondary:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.profile-btn.danger {
    background: var(--error-color);
    color: white;
}

.profile-btn.danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

/* Profile Icon in Header */
.profile-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.profile-icon:hover {
    transform: scale(1.05);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.profile-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-icon.placeholder {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 14px;
}

/* Loading States */
.auth-loading {
    position: relative;
    pointer-events: none;
}

.auth-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Error States */
.form-error {
    color: var(--error-color);
    font-size: 12px;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.form-error::before {
    content: '⚠';
    font-size: 14px;
}

.form-input.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Success States */
.form-success {
    color: var(--success-color);
    font-size: 12px;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.form-success::before {
    content: '✓';
    font-size: 14px;
}

/* =============================================================================
   Authentication Animations
   ============================================================================= */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* =============================================================================
   Responsive Design for Authentication
   ============================================================================= */

@media (max-width: 768px) {
    .profile-modal-content {
        margin: 1rem;
        padding: 1.5rem;
        width: calc(100% - 2rem);
    }
    
    .profile-stats {
        grid-template-columns: 1fr;
    }
    
    .profile-actions {
        flex-direction: column;
    }
    
    .welcome-tab {
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .auth-form {
        gap: 1rem;
    }
}

/* =============================================================================
   Updated Authentication Layout Styles
   ============================================================================= */

/* Auth Container */
.auth-container {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.auth-inputs {
    margin-bottom: 1.5rem; /* Reduced from 2rem */
}

.auth-inputs .form-group {
    margin-bottom: 1rem; /* Reduced from 1.5rem */
}

.register-fields {
    animation: slideDown 0.3s ease-out;
}

.register-fields.hidden {
    display: none !important;
}

/* Auth Buttons Layout */
.auth-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.primary-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.secondary-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem; /* Reduced from 1.5rem */
}

.auth-btn {
    padding: 14px 20px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-btn.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.auth-btn.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-dark) 100%);
}

.auth-btn.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.auth-btn.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.guest-btn {
    min-width: 200px;
}

.auth-btn:active {
    transform: translateY(0);
}

.auth-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.auth-btn .btn-text {
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1;
    position: relative;
}

.auth-btn .btn-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.auth-btn:hover .btn-glow {
    opacity: 1;
}

/* Form Enhancements */
.form-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.input-container {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--auth-input-bg);
    border: 1px solid var(--auth-input-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all var(--transition-fast);
    outline: none;
    box-sizing: border-box;
}

.form-input:focus {
    border-color: var(--auth-input-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: var(--bg-tertiary);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.input-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 8px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0) 100%);
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.form-input:focus + .input-glow {
    opacity: 1;
}

/* Animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
        max-height: 0;
    }
    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 200px;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .primary-buttons {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .auth-btn {
        padding: 12px 16px;
        min-height: 45px;
        font-size: 13px;
    }
    
    .guest-btn {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    .auth-container {
        max-width: 100%;
        padding: 0 1rem;
    }
    
    .auth-buttons {
        gap: 0.75rem;
    }
    
    .primary-buttons {
        gap: 0.5rem;
    }
}